Can the Dark Matter be $10^6$ Solar Mass Objects?

Details Can the Dark Matter be $10^6$ Solar Mass Objects? Can the Dark Matter be $10^6$ Solar Mass Objects?

1993-08-17

arxiv.org/abs/astro-ph/9308022v1

Astronomy and Astrophysics

Astrophysics

TeX document, 7 pages, Institute for Advanced Study number AST 93/47

Scientific paper

10.1086/187079

If the dark matter in galactic halos is made up of compact, macroscopic objects (MO), such as black holes with $M_\MO >>M_{stars}$, gravitational scattering will lead to kinematic heating of the stars. Observational constraints on the amount of heating in the disk of the Milky Way put upper limits on $M_\MO \ltorder 10^{6.3}\msun $. We find limits that are three orders of magnitude more stringent by examining the heating limits in low mass stellar systems, where higher densities of dark matter and lower relative velocities disperse the stars in less than a billion years. Specifically, the structure and kinematics of the Local Group member GR8 yield a limit of $M_\MO \ltorder 6\times 10^{3}\msun$. If the properties of the dark matter are universal these results preclude the dominance of dark matter constituents in the cosmologically interesting mass range $\sim 10^6\msun$ and limit them to $M_\MO \ltorder 10^{3.7}\msun$. These results also rule out massive compact halo objects as significant contributors to the kinematic heating of the Galactic disk.

Affiliated with

Also associated with

No associations

Rating

Can the Dark Matter be $10^6$ Solar Mass Objects? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Can the Dark Matter be $10^6$ Solar Mass Objects?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Can the Dark Matter be $10^6$ Solar Mass Objects? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-39631